was a Japanese electronic rock band from Chiba Prefecture. Negoto formed in 2007 when the members were high school students. In 2008, the band won a special jury prize at the 1st , a music festival f
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589f0ab3f8c22a4dcfad078d7968fb8b5562b7fa734e87377a9e90bb0e056842. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16b223e7-8a2c-462e-b2c2-c138d05430d6.json and https://artists.proofprofile.net/proofs/artist/16b223e7-8a2c-462e-b2c2-c138d05430d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2b3de4df261731fd284ac07b991aaa544c10e6f2625b52ccd3b195447aba84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01003181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842aa1c2768643fb93ce02ca17a60c64c8426322e596b9838397eae5e338e58c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01101102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd321aad2bc57d59e508098e87cd7e2fa1009cfeca7f8d3582fcc522a78fcb306. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01101322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65fd62e913d88e16b82ebe200e22471a1492dbfc1ff4a73a832218b96248998. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01101325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc79a60d7c9468ace4bbce36381c83a4643514c55d2eea2906c05e5831ead46. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01202261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351e56053eb1293a18bc611179fc8ca4604f19459a2ba5c0a01daefd8749770. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901401366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8455ae378a12a6a6f882e9308ab041fdc002e90a6b3d2938a33f8867250bd9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901500284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62610b5623611f347992d585fe851dd390ec19f44f04be9c94777719758be212. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b93eade61b16390159b3c9ec6200335c01ee1a6b51d3ad69d6a993477610b7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901604035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ac1a1dd423fb8d3e3052d0a31589458b2050ddb1a7cc3ad61a4dc29644281c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:17:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901702258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ffc7839dcf0f4fa5eae8ca5e3b63d1fffc417242ec41a1cbbb7f64829f143b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:32:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901701693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910df5b24e0debf728a4c630fb9c17f83a46d938d13640459f5a10770b895309. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901703406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efde87faf1ff08303ac6fe313985b6e33289e3060f50f01f10ca84854619fdb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:19:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901702259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe477705eddd4a7739b5c0843c54a5af2f14696bc8c464315de10639c2d19243c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01001882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb0600466cc2a1a247b0aea818c2c3ed840d9db8a37ec6f27819ce11c9c4010. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01003182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd31d1ad999940f25fdb40ce46f45ec9ec09be19c2b33a2ac5a5628e116598ca. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKS01200161.